How do I Install this knife?

A Forum Thread for Counter-Strike: Source

Here I am! Back with a question :D.So I have found this crazy knife I want to use, but I dont know how to Install It. Well, I downloaded the files, but there are so many In the rar file. So If somebody could tell me how to set up the knife, that would be awesome! Here is the link of the knife I want to use: Link: https://gamebanana.com/skins/111909